Save the earth

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Across
  1. 4. Smoke causes this pollution.
  2. 6. We should not have ____________ showers.
  3. 7. We should use less of something.
  4. 10. We should donate old clothes to __________.
  5. 11. Sewage from factories causes this pollution.
  6. 13. We use the paper again.
  7. 14. We need to use less __________.
  8. 16. We should _________ our own bag.
  9. 17. We should not use _______ forks and spoons.
  10. 18. This pollution affect people's sleep.
Down
  1. 1. We should __________ down the air-conditioner.
  2. 2. Too much rubbish causes this pollution.
  3. 3. We should recycle ___________ bottles.
  4. 5. We make something new from old things.
  5. 8. We need to save _______.
  6. 9. We should not __________ the tap on.
  7. 12. Construction equipment causes this pollution.
  8. 15. We should pick up __________.